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単語・連語小テスト
LESSON 1

Potential Uses of Optical Illusions

授業展開例

wall is slightly higher on its northern end. These factors
create an optical illusion that makes this surface look

Potential Uses of
Optical Illusions

deeper. This effect is the same as the one seen in the Ponzo
Illusion (Figure 1) in which the horizontal line closer to the5Questions

top looks longer than the line below it, even though the two

5 In tthe lenhorizo(vertica

are exactly the same length.
1

Look at the illustration below. What do you see? Some1(people might see a rabbit facing to the right, while others
how our eyes can be tricked, what is called an optical
Such illusions have been used in various ways

Optical illusions) our eyes.

a. useb. seec. trickmight see a duck facing to the left. This illustration showsillusion.

4 Wh
the opused t
look d5which we can see in our daily lives.

Structural designs
often incorporate().
2a. lonb. thec. sho

The karesansui at the Zen temple at Ryōanji

3The optical illusion
at Ryōanji makes thesurface look() although itinclines.
3

Figure 1: An example of thePonzo Illusion

6 Themake(Second, another optical illusion can be seen in the picture

below, which shows the interior of a house that appears tohave an extremely high ceiling. The effect is caused by the10Fick Illusion (Figure 2), in which the vertical line seems
longer than the horizontal line despite their lengths being
precisely the same. Using this effect can make a room look
more spacious than it actually is.

First, one example is the manner in which they havehistorically been incorporated into structural designs. The
karesansui (dry landscape) garden at the Zen temple
Ryōanji in Kyoto illustrates such a use. Its surface may

10

look completely level, but actually, it inclines towards thegarden’s south-east corner.

Also, the west-side earthen

illustration [ìləstréiʃ n]historically [hist�ːrikəli]structural [str�ktʃ r l]illustrate [íləstrèit]
incline [inkláin]earthen [�ːrɵn]el. 9 karesansui (dry landscape) garden

A house whose ceiling appears extremely highlandscape [lǽndskèip]

e eW

枯山水

E

l. 4 what is calledGl. 7 First, one example is the manner in which they have historically been incorporated into structural designs.

northern [n�ːrðərn]factor [fǽktər]l. 10 Fick [fík] Illusion フィック錯視E

l. 4 close to 〜interior [intí riər]G

l. 9 The effect is caused by the Fick Illusion (Figure 2), in which the vertical line seems longer tha
despite their lengths being precisely the same.

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Potential Uses of Optical Illusions
4 What is the name ofthe optical illusion
used to make a surface
look deeper?

wall is slightly higher at its northern end. These factors
create an optical illusion that makes this surface look

Potential Uses of
Optical Illusions

deeper. This effect is the same as the one seen in the Ponzo
Illusion (Figure 1), in which the horizontal line closer to the5Questions

top looks longer than the line below it, even though the two
5 In the Fick Illusion,
the length of thehorizontal line is() that of thevertical one.

are exactly the same length.
1

Look at the illustration below. What do you see? Some1(people might see a rabbit facing to the right, while others
how our eyes can be tricked, what is called an optical
Such illusions have been used in various ways

Optical illusions) our eyes.

本文側注の内容確認問題

a. useb. seec. trickmight see a duck facing to the left. This illustration showsillusion.

関連教材

LESSON 1

a. longer thanb. the same asc. shorter than5

which we can see in our daily lives.

2 Structural designs
often incorporate().

The karesansui at the Zen temple Ryōanji

3

6 The Fick Illusion canmake a room look more().

Figure 1: An example of thePonzo Illusion

Second, another optical illusion can be seen in the picture

below, which shows the interior of a house that appears tohave an extremely high ceiling. The effect is caused by the10

指 導 用 Data

The optical illusion
at Ryōanji makes thesurface look() although itinclines.
3Fick Illusion (Figure 2), in which the vertical line seems
longer than the horizontal line despite their lengths being
precisely the same. Using this effect can make a room look
more spacious than it actually is.

The rabbit-duck illusion

2

First, one example is the manner in which they havehistorically been incorporated into structural designs. The
karesansui (dry landscape) garden at the Zen temple
Ryōanji in Kyoto illustrates such a use. Its surface may10look completely level, but actually, it inclines towards theAlso, the west-side earthen

A house whose ceiling appears extremely highWillustration [ìləstréiʃ n]historically [hist�ːrikəli]
structural [str�ktʃ r l]illustrate [íləstrèit]
incline [inkláin]earthen [�ːrɵn]l. 9 karesansui (dry landscape) garden 枯山水

landscape [lǽndskèip]

El. 4 what is calledG

l. 7 First, one example is the manner in which they have historically been incorporated into structural designs.

Figure 2: An example of the Fick Illusion

Wnorthern [n�ːrðərn]factor [fǽktər]l. 10 Fick [fík] Illusion フィック錯視

interior [intí riər]E

l. 4 close to 〜

Gl. 9 The effect is caused by the Fick Illusion (Figure 2), in which the vertical line seems longer than the horizontal line
despite their lengths being precisely the same.

egarden’s south-east corner.

spacious [spéiʃəs]l. 8 appear to do[be]e ee2021

LESSON 1

Digital

TRUE OR FALSE

Potential Uses of Optical Illusions

Rapid Reading
Look at the illustration below. What do you see? Some people might see arabbit facing to the right, while others might see a duck facing to the left.
This illustration shows how our eyes can be tricked, what is called an opticalillusion. Such illusions have been used in various ways which we can see in5
our daily lives.
First, one example is the manner in which they have historically been
incorporated into structural designs. The karesansui (dry landscape) garden
at the Zen temple Ryōanji in Kyoto illustrates such a use. Its surface may
look completely level, but actually, it inclines towards the garden’s southeast corner. Also, the west-side earthen wall is slightly higher at its 10
northern end. These factors create an optical illusion that makes thissurface look deeper. This effect is the same as the one seen in the Ponzo
Illusion (Figure 1), in which the horizontal line closer to the top looks longer
than the line below it, even though the two are exactly the same length.
Second, another optical illusion can be seen in the picture below, which 15shows the interior of a house that appears to have an extremely high ceiling.
The effect is caused by the Fick Illusion (Figure 2), in which the vertical line
seems longer than the horizontal line despite their lengths being precisely thesame. Using this effect can make a room look more spacious than it actually
20is.
Third, another technique employed recently is to create, on a twodimensional surface, the appearance of a three-dimensional object. In one
train station, for instance, people are frequently unable to find an elevator
located in a blind spot. To assist them, a sign that appears to be threedimensional is painted on the floor. The sign is of significant help in sending 25
people in the right direction.
Last, they can be used at an intersection with no traffic lights. Crosswalk
designs that look three-dimensional have been painted on some roads toprevent traffic accidents. From the viewpoint of approaching drivers, it looks
like large concrete blocks are in the road. Hopefully, drivers will slow down 30
when they see them, before nearing the crosswalk.

5Of course, the power of optical illusions is limited. It cannot make agarden larger, nor can it make a ceiling higher. Over time, a crosswalk
painted to appear three-dimensional will lose its effectiveness in preventing
accidents. Drivers will come to realize that what they are seeing is just anillusion. Nonetheless, with such limitations kept in mind, it should bepossible to find an even wider variety of useful applications of opticalillusions.
total words 435min.

sec.

TF 形式の内容確認問題
TRUE OR FALSE

1. ()

2. ()

3. ()

4. ()

5. ()

1. The karesansui garden uses the same type of optical illusion as the Ponzo Illusion.
2. In the Fick Illusion, the upper line looks longer than the lower line, even though they are the same length.
3. Drivers believe without a doubt that three-dimensional crosswalks on streets are real concrete blocks.
4. Optical illusions can make gardens larger and also ceilings higher.
5. In spite of their limitations, optical illusions have the potential to be effectively used in wider ways.

28

2967

spacious [spéiʃəs]l. 8 appear to do[be]20

QuestionsFigure 2: An example of the Fick IllusionWe

新出単語・表現

紙面紹介

The rabbit-duck illusion2